J2MEPNGEncoder J2ME PngEncoder takes a Java Image object and creates a byte string which can be saved as a PNG file. In this application, we demostrate that the jpg format file can be convert to a png format file in a J2ME CLDC 1.0 enviorment whic is very useful and critical for any J2ME image application. User can load the jpg file from a http server, snapshot from the camera, or from a local file, after convert, can save or upload.